Aquatherm extends its Climatherm line to meet the rising demand for PP-R in larger projects. Designed for HVAC applications, Climatherm SDR 17.6 is now available in sizes ranging from 6”-diameter to 24”-diameter for energy-efficient applications such as heat pumps and large chilled water systems. PP-R pipe is resistant to POE oil (polyolester oil) and other oils in HVAC mechanical systems. The natural insulation value (R-value of 1) makes it ideal for direct-buried applications and it is